231306253 has 2 divisors, whose sum is σ = 231306254. Its totient is φ = 231306252.

The previous prime is 231306227. The next prime is 231306263. The reversal of 231306253 is 352603132.

It is a happy number.

231306253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168532324 + 62773929 = 12982^2 + 7923^2 .

It is a cyclic number.

It is not a de Polignac number, because 231306253 - 2¹³ = 231298061 is a prime.

It is equal to p_12710491 and since 231306253 and 12710491 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231306263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115653126 + 115653127.

It is an arithmetic number, because the mean of its divisors is an integer number (115653127).

Almost surely, 2^231306253 is an apocalyptic number.

It is an amenable number.

231306253 is a deficient number, since it is larger than the sum of its proper divisors (1).

231306253 is an equidigital number, since it uses as much as digits as its factorization.

231306253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 231306253 is about 15208.7558005249. The cubic root of 231306253 is about 613.8502793244.

Adding to 231306253 its reverse (352603132), we get a palindrome (583909385).

The spelling of 231306253 in words is "two hundred thirty-one million, three hundred six thousand, two hundred fifty-three".